<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2011 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel2007
 * @copyright  Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    1.7.6, 2011-02-27
 */


/**
 * PHPExcel_Writer_Excel2007_Drawing
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel2007
 * @copyright  Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Writer_Excel2007_Drawing extends PHPExcel_Writer_Excel2007_WriterPart
{
    /**
     * Write drawings to XML format
     *
     * @param     PHPExcel_Worksheet                $pWorksheet
     * @return     string                                 XML Output
     * @throws     Exception
     */
    public function writeDrawings(PHPExcel_Worksheet $pWorksheet = null)
    {
        // Create XML writer
        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
        }

        // XML header
        $objWriter->startDocument('1.0','UTF-8','yes');

        // xdr:wsDr
        $objWriter->startElement('xdr:wsDr');
        $objWriter->writeAttribute('xmlns:xdr', 'http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing');
        $objWriter->writeAttribute('xmlns:a', 'http://schemas.openxmlformats.org/drawingml/2006/main');

            // Loop through images and write drawings
            $i = 1;
            $iterator = $pWorksheet->getDrawingCollection()->getIterator();
            while ($iterator->valid()) {
                $this->_writeDrawing($objWriter, $iterator->current(), $i);

                $iterator->next();
                ++$i;
            }

        $objWriter->endElement();

        // Return
        return $objWriter->getData();
    }

    /**
     * Write drawings to XML format
     *
     * @param     PHPExcel_Shared_XMLWriter            $objWriter         XML Writer
     * @param     PHPExcel_Worksheet_BaseDrawing        $pDrawing
     * @param     int                                    $pRelationId
     * @throws     Exception
     */
    public function _writeDrawing(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet_BaseDrawing $pDrawing = null, $pRelationId = -1)
    {
        if ($pRelationId >= 0) {
            // xdr:oneCellAnchor
            $objWriter->startElement('xdr:oneCellAnchor');
                // Image location
                $aCoordinates         = PHPExcel_Cell::coordinateFromString($pDrawing->getCoordinates());
                $aCoordinates[0]     = PHPExcel_Cell::columnIndexFromString($aCoordinates[0]);

                // xdr:from
                $objWriter->startElement('xdr:from');
                    $objWriter->writeElement('xdr:col', $aCoordinates[0] - 1);
                    $objWriter->writeElement('xdr:colOff', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getOffsetX()));
                    $objWriter->writeElement('xdr:row', $aCoordinates[1] - 1);
                    $objWriter->writeElement('xdr:rowOff', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getOffsetY()));
                $objWriter->endElement();

                // xdr:ext
                $objWriter->startElement('xdr:ext');
                    $objWriter->writeAttribute('cx', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getWidth()));
                    $objWriter->writeAttribute('cy', PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getHeight()));
                $objWriter->endElement();

                // xdr:pic
                $objWriter->startElement('xdr:pic');

                    // xdr:nvPicPr
                    $objWriter->startElement('xdr:nvPicPr');

                        // xdr:cNvPr
                        $objWriter->startElement('xdr:cNvPr');
                        $objWriter->writeAttribute('id', $pRelationId);
                        $objWriter->writeAttribute('name', $pDrawing->getName());
                        $objWriter->writeAttribute('descr', $pDrawing->getDescription());
                        $objWriter->endElement();

                        // xdr:cNvPicPr
                        $objWriter->startElement('xdr:cNvPicPr');

                            // a:picLocks
                            $objWriter->startElement('a:picLocks');
                            $objWriter->writeAttribute('noChangeAspect', '1');
                            $objWriter->endElement();

                        $objWriter->endElement();

                    $objWriter->endElement();

                    // xdr:blipFill
                    $objWriter->startElement('xdr:blipFill');

                        // a:blip
                        $objWriter->startElement('a:blip');
                        $objWriter->writeAttribute('xmlns:r', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships');
                        $objWriter->writeAttribute('r:embed', 'rId' . $pRelationId);
                        $objWriter->endElement();

                        // a:stretch
                        $objWriter->startElement('a:stretch');
                            $objWriter->writeElement('a:fillRect', null);
                        $objWriter->endElement();

                    $objWriter->endElement();

                    // xdr:spPr
                    $objWriter->startElement('xdr:spPr');

                        // a:xfrm
                        $objWriter->startElement('a:xfrm');
                        $objWriter->writeAttribute('rot', PHPExcel_Shared_Drawing::degreesToAngle($pDrawing->getRotation()));
                        $objWriter->endElement();

                        // a:prstGeom
                        $objWriter->startElement('a:prstGeom');
                        $objWriter->writeAttribute('prst', 'rect');

                            // a:avLst
                            $objWriter->writeElement('a:avLst', null);

                        $objWriter->endElement();

//                        // a:solidFill
//                        $objWriter->startElement('a:solidFill');

//                            // a:srgbClr
//                            $objWriter->startElement('a:srgbClr');
//                            $objWriter->writeAttribute('val', 'FFFFFF');

///* SHADE
//                                // a:shade
//                                $objWriter->startElement('a:shade');
//                                $objWriter->writeAttribute('val', '85000');
//                                $objWriter->endElement();
//*/

//                            $objWriter->endElement();

//                        $objWriter->endElement();
/*
                        // a:ln
                        $objWriter->startElement('a:ln');
                        $objWriter->writeAttribute('w', '88900');
                        $objWriter->writeAttribute('cap', 'sq');

                            // a:solidFill
                            $objWriter->startElement('a:solidFill');

                                // a:srgbClr
                                $objWriter->startElement('a:srgbClr');
                                $objWriter->writeAttribute('val', 'FFFFFF');
                                $objWriter->endElement();

                            $objWriter->endElement();

                            // a:miter
                            $objWriter->startElement('a:miter');
                            $objWriter->writeAttribute('lim', '800000');
                            $objWriter->endElement();

                        $objWriter->endElement();
*/

                        if ($pDrawing->getShadow()->getVisible()) {
                            // a:effectLst
                            $objWriter->startElement('a:effectLst');

                                // a:outerShdw
                                $objWriter->startElement('a:outerShdw');
                                $objWriter->writeAttribute('blurRad',         PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getShadow()->getBlurRadius()));
                                $objWriter->writeAttribute('dist',            PHPExcel_Shared_Drawing::pixelsToEMU($pDrawing->getShadow()->getDistance()));
                                $objWriter->writeAttribute('dir',            PHPExcel_Shared_Drawing::degreesToAngle($pDrawing->getShadow()->getDirection()));
                                $objWriter->writeAttribute('algn',            $pDrawing->getShadow()->getAlignment());
                                $objWriter->writeAttribute('rotWithShape',     '0');

                                    // a:srgbClr
                                    $objWriter->startElement('a:srgbClr');
                                    $objWriter->writeAttribute('val',        $pDrawing->getShadow()->getColor()->getRGB());

                                        // a:alpha
                                        $objWriter->startElement('a:alpha');
                                        $objWriter->writeAttribute('val',     $pDrawing->getShadow()->getAlpha() * 1000);
                                        $objWriter->endElement();

                                    $objWriter->endElement();

                                $objWriter->endElement();

                            $objWriter->endElement();
                        }
/*

                        // a:scene3d
                        $objWriter->startElement('a:scene3d');

                            // a:camera
                            $objWriter->startElement('a:camera');
                            $objWriter->writeAttribute('prst', 'orthographicFront');
                            $objWriter->endElement();

                            // a:lightRig
                            $objWriter->startElement('a:lightRig');
                            $objWriter->writeAttribute('rig', 'twoPt');
                            $objWriter->writeAttribute('dir', 't');

                                // a:rot
                                $objWriter->startElement('a:rot');
                                $objWriter->writeAttribute('lat', '0');
                                $objWriter->writeAttribute('lon', '0');
                                $objWriter->writeAttribute('rev', '0');
                                $objWriter->endElement();

                            $objWriter->endElement();

                        $objWriter->endElement();
*/
/*
                        // a:sp3d
                        $objWriter->startElement('a:sp3d');

                            // a:bevelT
                            $objWriter->startElement('a:bevelT');
                            $objWriter->writeAttribute('w', '25400');
                            $objWriter->writeAttribute('h', '19050');
                            $objWriter->endElement();

                            // a:contourClr
                            $objWriter->startElement('a:contourClr');

                                // a:srgbClr
                                $objWriter->startElement('a:srgbClr');
                                $objWriter->writeAttribute('val', 'FFFFFF');
                                $objWriter->endElement();

                            $objWriter->endElement();

                        $objWriter->endElement();
*/
                    $objWriter->endElement();

                $objWriter->endElement();

                // xdr:clientData
                $objWriter->writeElement('xdr:clientData', null);

            $objWriter->endElement();
        } else {
            throw new Exception("Invalid parameters passed.");
        }
    }

    /**
     * Write VML header/footer images to XML format
     *
     * @param     PHPExcel_Worksheet                $pWorksheet
     * @return     string                                 XML Output
     * @throws     Exception
     */
    public function writeVMLHeaderFooterImages(PHPExcel_Worksheet $pWorksheet = null)
    {
        // Create XML writer
        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
        }

        // XML header
        $objWriter->startDocument('1.0','UTF-8','yes');

          // Header/footer images
          $images = $pWorksheet->getHeaderFooter()->getImages();

        // xml
        $objWriter->startElement('xml');
        $objWriter->writeAttribute('xmlns:v', 'urn:schemas-microsoft-com:vml');
        $objWriter->writeAttribute('xmlns:o', 'urn:schemas-microsoft-com:office:office');
        $objWriter->writeAttribute('xmlns:x', 'urn:schemas-microsoft-com:office:excel');

            // o:shapelayout
            $objWriter->startElement('o:shapelayout');
            $objWriter->writeAttribute('v:ext',         'edit');

                // o:idmap
                $objWriter->startElement('o:idmap');
                $objWriter->writeAttribute('v:ext',     'edit');
                $objWriter->writeAttribute('data',         '1');
                $objWriter->endElement();

            $objWriter->endElement();

            // v:shapetype
            $objWriter->startElement('v:shapetype');
            $objWriter->writeAttribute('id',                     '_x0000_t75');
            $objWriter->writeAttribute('coordsize',             '21600,21600');
            $objWriter->writeAttribute('o:spt',                 '75');
            $objWriter->writeAttribute('o:preferrelative',         't');
            $objWriter->writeAttribute('path',                     'm@4@5l@4@11@9@11@9@5xe');
            $objWriter->writeAttribute('filled',                 'f');
            $objWriter->writeAttribute('stroked',                 'f');

                // v:stroke
                $objWriter->startElement('v:stroke');
                $objWriter->writeAttribute('joinstyle',         'miter');
                $objWriter->endElement();

                // v:formulas
                $objWriter->startElement('v:formulas');

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'if lineDrawn pixelLineWidth 0');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'sum @0 1 0');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'sum 0 0 @1');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'prod @2 1 2');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'prod @3 21600 pixelWidth');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'prod @3 21600 pixelHeight');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'sum @0 0 1');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'prod @6 1 2');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'prod @7 21600 pixelWidth');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'sum @8 21600 0');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'prod @7 21600 pixelHeight');
                    $objWriter->endElement();

                    // v:f
                    $objWriter->startElement('v:f');
                    $objWriter->writeAttribute('eqn',         'sum @10 21600 0');
                    $objWriter->endElement();

                $objWriter->endElement();

                // v:path
                $objWriter->startElement('v:path');
                $objWriter->writeAttribute('o:extrusionok',     'f');
                $objWriter->writeAttribute('gradientshapeok',     't');
                $objWriter->writeAttribute('o:connecttype',     'rect');
                $objWriter->endElement();

                // o:lock
                $objWriter->startElement('o:lock');
                $objWriter->writeAttribute('v:ext',             'edit');
                $objWriter->writeAttribute('aspectratio',         't');
                $objWriter->endElement();

            $objWriter->endElement();

            // Loop through images
            foreach ($images as $key => $value) {
                $this->_writeVMLHeaderFooterImage($objWriter, $key, $value);
            }

        $objWriter->endElement();

        // Return
        return $objWriter->getData();
    }

    /**
     * Write VML comment to XML format
     *
     * @param     PHPExcel_Shared_XMLWriter        $objWriter             XML Writer
     * @param    string                            $pReference            Reference
     * @param     PHPExcel_Worksheet_HeaderFooterDrawing    $pImage        Image
     * @throws     Exception
     */
    public function _writeVMLHeaderFooterImage(PHPExcel_Shared_XMLWriter $objWriter = null, $pReference = '', PHPExcel_Worksheet_HeaderFooterDrawing $pImage = null)
    {
        // Calculate object id
        preg_match('{(\d+)}', md5($pReference), $m);
        $id = 1500 + (substr($m[1], 0, 2) * 1);

        // Calculate offset
        $width = $pImage->getWidth();
        $height = $pImage->getHeight();
        $marginLeft = $pImage->getOffsetX();
        $marginTop = $pImage->getOffsetY();

        // v:shape
        $objWriter->startElement('v:shape');
        $objWriter->writeAttribute('id',             $pReference);
        $objWriter->writeAttribute('o:spid',         '_x0000_s' . $id);
        $objWriter->writeAttribute('type',             '#_x0000_t75');
        $objWriter->writeAttribute('style',         "position:absolute;margin-left:{$marginLeft}px;margin-top:{$marginTop}px;width:{$width}px;height:{$height}px;z-index:1");

            // v:imagedata
            $objWriter->startElement('v:imagedata');
            $objWriter->writeAttribute('o:relid',         'rId' . $pReference);
            $objWriter->writeAttribute('o:title',         $pImage->getName());
            $objWriter->endElement();

            // o:lock
            $objWriter->startElement('o:lock');
            $objWriter->writeAttribute('v:ext',         'edit');
            $objWriter->writeAttribute('rotation',         't');
            $objWriter->endElement();

        $objWriter->endElement();
    }


    /**
     * Get an array of all drawings
     *
     * @param     PHPExcel                            $pPHPExcel
     * @return     PHPExcel_Worksheet_Drawing[]        All drawings in PHPExcel
     * @throws     Exception
     */
    public function allDrawings(PHPExcel $pPHPExcel = null)
    {
        // Get an array of all drawings
        $aDrawings    = array();

        // Loop through PHPExcel
        $sheetCount = $pPHPExcel->getSheetCount();
        for ($i = 0; $i < $sheetCount; ++$i) {
            // Loop through images and add to array
            $iterator = $pPHPExcel->getSheet($i)->getDrawingCollection()->getIterator();
            while ($iterator->valid()) {
                $aDrawings[] = $iterator->current();

                  $iterator->next();
            }
        }

        return $aDrawings;
    }
}
